Christian Budde has released a new version of his VST Plugin Analyser.

New features:

Can deal with more than one preset.

Can measure the performance of parameter change events.

Fixed a bug with GUI less plugins.

Can tweak hidden parameters.

Christian has also announced that he is developing a "professional version", which can do many additional things such as SNR calculation, Input vs. Output comparison, references for frequency and dynamic response and remodeling of the given plugin. The professional version is expected to cost around EU€20 and Christian is currently collecting feature requests, so if there is something you want to see let him know.